Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections.

Despite the relatively small temporal group‐specific sample sizes, our resampling tests (Figure 4 ) showed that many of the observed differences in haplotype frequencies are unlikely to be caused by mere sampling variation: Five haplotypes in TG1–TG4 showed a nominally significant difference from TG5 within at least one time period (seven significant differences in all).

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